Furnace



A. SMALLWOOD.

FURNACE. APPLICATIQN FILED JULY 31,1918- 1,335,202. Patented Mar. 30,1920.-

4 SHEETS-SHEET I. Q

0, 1920. SHEET 2.

A.. SMALLWOOD, FURNACE..

' APPLICATION FILED JULY 3111918. "1,335,202, Patented M 4 SHEET UNITEDSTATES PATENT oFFIoE.

ALFRED SMALLWOOD, OF LONDON, ENGLAND.

FUnnAcE.

Application filed J'uly 31, 1918.

According to the present invention I combine a recuperator system forheating the air for combustion with a furnace in which the heat isapplied to the goods by a series of individually regnlable ports.

I advantageously provide a main primary combustion chamber whichdelivers to aheat fine or fines from which the distribution ports extendto the goods chamber. "The recuperated air may be admitted to thiscombustion chamber at a position in the vicinity of its ingressextremity and also at a position substantially advanced along thecombustion chamber having regard to the difurnace shown in Fig. 1, the

rection of fiow of the contents therein.

In order that this invention may be clearly understood and readilycarried into prac tice, reference may be had to the append- -edexplanatory sheets of drawings upon which 1 Figure 1 is a sectional sideelevation of a furnace constructed according to the present invention.

Fig. 2 is a sectional end elevation of the plane of section being online 1-2 of the figure last mentioned.

Fig. 3 is a sectional plan, the section being taken on line 34 of Fig.2, and

Fig. 4: is a sectional elevation, the section being taken on line 5-6 ofFig. 1.

In a convenient embodiment of the present invention, the furnace 1comprises a structure involving a goods chamber a at the top extendingsubstantially the full length of the structure, a longitudinalcombustion chamber Z) disposed below said goods chamber, and alsoextending longitudinally of the structure, and two longitudinal heatfines 0 one on each side of said combustion chamber. From each heat fluetoone side of the combustion chamber a series of ports cl or conduitsare provided at intervals along the length of the furnace. These portsare individually regnlable by blocks or bungs Specification of LettersPatent. Patented lVIar. 30, 1920.

Serial No. 247,642.

(5 so that more or less heat can be supplied to any particular part ofthe goods chamber.

At one end 6 of the combustion chamber provision is incorporated foradmitting gas for combustion. At its other end the combustion chambercommunicates by lateral ports 7 with the heat flues 0.

Below the combustion-chamber and heat fines a recuperator system isincorporated.

This may comprise three forward and return gas fines arranged atintervals in the width of the furnace. The goods chamber may communicateat its extremity 9 above the ingress extremity of the combustion chamberwith two depending fines k which extend one at each side of thecombustion chamber 6. Below the combustion chamber these depending finesh adjoin a common space z'which is in communication with; the upperforwardly extending parts j of the three waste gas flues. These upperportions of the waste gas lines extend substantially the length of thefurnace and adjoin the lower parts 70 of the waste gas fines whichextend in a reverse direction to the front extremity of the furnace atwhich they adjoin a transverse flue Z leading to the stack.

Located intermediately to the three gas fines are two forward and returnair fines. A transverse air inlet m is provided at the rear extremityofthe furnace and from this air inlet the lower parts a of the two gasfines extend toward the front extremity of the furnace at positionsbetween the waste gas fines 7c and at a point near to the transversefiue Z leading to the stack said air lines returning at a higher levelat 0. At the 1 rear of the furnace the air flues then pass into a seriesor layer of five hot air flues p located above the air and gas finesabove described. These five air flues which may adjoin each other at therear extremity of the recuperator svstem at q extend forwardlysubstantially the full length of the recuperator svstem to a point atwhich they enter a distributing chamber 7 for the hot air. From thisdistributing chamber two flues s extend one on each side toward thefront of the furnaces and ultimately communicate by three ports 25 witheach side of the ingress extremity of the combustion chamber 7).Immediately in front of the said air ingress ports a bafiie u may beprovided in the combustion chamber. Two other conduits 42 extend fromthe hot air distributing chamber rearWardly a substantial part of thelength of the combustion chainher and communicate by regulable hot airports w one on each side with the combustion chamber 6 at a positionnear to its rear extremity.

Individually regulable heat distribution ports 00 may be provided acrossthe rear end of the goods chamber. From the transverse Hues f by whichcommunication is established between the combustion chamber 7) and thetwo flues 0 the ports 00 extend upwardly similar to the flues cl butopening into the floor of the goods chamber.

What I claim as my invention and desire to secure by Letters Patentis 1. A furnace, including a goods chamber, a recuperator system adaptedto receive the waste gases from said goods chamber, a combustionchamber, means for conducting air for combustion through saidrecuperator system, heat fines extending along said com bustion chamberand interconnecting therewith, and individually regulable heatdistributing ports extending from said flue to the goods chamber.

2. A furnace, including a 'oods chamber, a recuperator system adapted toreceive the waste gases from said goods chamber, a'combustion chamber,means for conducting air for combustion through said recuperator system,heat flues extending along said combustion chamber and interconnectingtherewith, and individually regulable heat distributing ports extendingfrom said flue to the goods chamber, said recuperator system beingarranged below said goods chamber.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

ALFRED SMALLVVOOD.

Witnesses:

ARTHUR H. BROWN, EDGAR N. WHEELER.

